Thanks again for all of your prompt responses.
@Teacher4PHD: Thanks for the advice about long-suffering Americanists- my interests have been trending more towards the medieval period for a while, so that actually works. In addition, from the programs I've looked at French and Latin are languages I could use for medieval history, especially in my fields of interest. Good point on the letters, although I'd like to think so, I'm probably not that different than the kid with the 4.0 in History. I went to England for a summer with one, I'll probably use him. As for commitment, I'm more serious than I let on. I thought about a few part time programs that are local, but frankly, with my current job that's impossible as I work 60-80 hours a week.
@Goldielocks: I've read those articles- and you're quite right, which is why I have no intention of giving up my law license. I'm ok with competition, though I'm sure they all are too. Law school was very similar. I'd like to research, write, and possibly teach. My favorite part of undergraduate school was writing history papers, particularly when I could get my hands on primary sources. Even as a lawyer, while going to court is any litigator's favorite thing, for me research is a close second. It's just the subject matter I don't care for. I don't think of history as a fallback plan- I think of my law degree as a fallback plan.
@ticklemepink: The money is a concern, but not a huge one. I never had money before, and I don't expect to miss it very much. In my experience, money just gives you options to upgrade the things you have, and those upgrades don't really buy you much than other people's opinion. For instance, my BMW convertible is, for what I usually use it for, not functionally superior than the 1997 Grand Am I drove before I bought it. Besides, they're both red. The way people respond when you drive up in each is very, very different however. I'm working at the languages again I'm rusty, but it's coming back. Especially the Latin.
@Sigaba: Thanks for the practical advice. I'm actually just finishing up about a three month leave of absence. I took it for personal reasons, but it has afforded me the opportunity to reflect on my priorities, and it seems very clear to me that the law is not one of them. As I said, I'd like to keep my license as even if the history thing works out, I do sometimes enjoy pro bono cases. I thought about pursuing more public interest law job in the future, but I don't really have more passion for that, it's just relatively more enjoyable than saving companies from themselves. One of my favorite past times in college was to read old dissertations, just because they were always so unique. And I still subscribe to academic history journals for pleasure reading. I do think it would help me to narrow in more specific interests however.